/*
 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */

package com.sun.imageio.plugins.bmp;

import java.util.Locale;
import javax.imageio.spi.ImageReaderSpi;
import javax.imageio.stream.ImageInputStream;
import javax.imageio.spi.IIORegistry;
import javax.imageio.spi.ServiceRegistry;
import java.io.IOException;
import javax.imageio.ImageReader;
import javax.imageio.IIOException;

public class BMPImageReaderSpi extends ImageReaderSpi {

  private static String[] writerSpiNames =
      {"com.sun.imageio.plugins.bmp.BMPImageWriterSpi"};
  private static String[] formatNames = {"bmp", "BMP"};
  private static String[] entensions = {"bmp"};
  private static String[] mimeType = {"image/bmp"};

  private boolean registered = false;

  public BMPImageReaderSpi() {
    super("Oracle Corporation",
        "1.0",
        formatNames,
        entensions,
        mimeType,
        "com.sun.imageio.plugins.bmp.BMPImageReader",
        new Class[]{ImageInputStream.class},
        writerSpiNames,
        false,
        null, null, null, null,
        true,
        BMPMetadata.nativeMetadataFormatName,
        "com.sun.imageio.plugins.bmp.BMPMetadataFormat",
        null, null);
  }

  public void onRegistration(ServiceRegistry registry,
      Class<?> category) {
    if (registered) {
      return;
    }
    registered = true;
  }

  public String getDescription(Locale locale) {
    return "Standard BMP Image Reader";
  }

  public boolean canDecodeInput(Object source) throws IOException {
    if (!(source instanceof ImageInputStream)) {
      return false;
    }

    ImageInputStream stream = (ImageInputStream) source;
    byte[] b = new byte[2];
    stream.mark();
    stream.readFully(b);
    stream.reset();

    return (b[0] == 0x42) && (b[1] == 0x4d);
  }

  public ImageReader createReaderInstance(Object extension)
      throws IIOException {
    return new BMPImageReader(this);
  }
}
